#box1{
      width:50px;
      height: 50px;
      background-color: orange;
    }
#box2{
      width:400px;
      height: 400px;
      background-color: green;
    }
#box3 {
      width: 300px;
      height: 300px;
      background-color: purple;
    }
#box4 {
      width: 200px;
      height: 200px;
      background-color: indigo;
    }
